The Champaign-Urbana area has long been suffering from the heinous pathogenic bacterium, Michiganious wolverinous, which causes rabid wolverine fever. During 2019, the Champaign Public Health Department reported an incidence of 1000 cases of rabid wolverine fever. If the number of pre-existing cases carried over from 2018 to 2019 was 2000 cases, then the prevalence of rabid wolverine fever in 2020 was .

a. 3000 cases

b. 4000 cases

c. 1000 cases

d. 0 cases

e. 2000 cases

The correct answer is option a, that is, 3000 cases.

Explanation:

The measurement of all the individuals getting influenced by the disease at a specific time is known as the prevalence. On the other hand, the measurement of the number of novel individuals that came into contact with a disease during a specific time duration is known as the incidence.  

Based on the given question, the number of prevailing cases carried from 2018 to 2019 is 2000, and the new diseases recorded in the year 2019 is 1000 (incidence). Therefore, the prevalence of the disease in 2020 will be 3000 cases.